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Old 07-09-2011, 06:52 PM
idlewyld89 idlewyld89 is offline
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Default Rear differential - type of oil, SAE or GL-5???

Hey everyone, I'm replacing the lube in my differential tomorrow, and I wanted to make sure I get the right stuff. I have a bottle of GL-5 80w 90 sitting around, but the book technically calls for SAE 80w 90 gear oil. Is there any difference, and/or is it safe to use what I've already got?

BTW: 2003 Ranger 2.3L 4cyl 2WD (Non-L/S diff.)
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Old 07-09-2011, 07:46 PM
Twisty Twisty is offline
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Default Re: Rear differential - type of oil, SAE or GL-5???

API Category GL-5 designates the type of service characteristic of gears, particularly hypoids in automotive axles under high-speed and/or low-speed, high-torque conditions. Lubricants qualified under U.S. Military specification MIL-L-2105D (formerly MIL-L-2015C), MIL-PRF-2105E and SAE J2360 satisfy the requirements of the API GL-5 service designation.

SAE J2360 standard is a new global quality standard that defines a level of performance equivalent to that defined by MIL-PRF-2105E, a U.S. military standard for approval that was not available to oil blenders in all parts of the world. It includes all of the most recent axle and transmission testing requirements identified in API GL-5, API MT-1, and MIL-PRF-2105E including the need to demonstrate proof-of-performance through rigorous field testing
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Old 07-09-2011, 10:37 PM
idlewyld89 idlewyld89 is offline
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Default Re: Rear differential - type of oil, SAE or GL-5???

Yep, that was result #1 on the google.

Was perhaps looking for a more hands-on response. I'm still not 100% sure what the differences are... I read through the website you got those descriptions from.

http://www.lubrizol.com/DrivelineAdd...arOil/GL5.html

For those of you interested in reading.
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